Copy and paste the PGP public key block text and import it in to your PGP software.

Verify the fingerprint from other sources (this page is TLS encrypted so it is unlikely, but not impossible, for it to have been tampered with in transit) e.g. via Twitter
and Public PGP/GPG Key Servers (see below)

Free versions of PGP / GPG encryption software are available for download,
for multiple platforms, from: